def getVerifyCoefficientForPlayer(self, groupId, hiddenEvals, hiddenPolys,
fromOrdinal, toOrdinal):
# get the coefficients that 'from' player sent to all, where 'from' and 'to' are ordinals
resCoeffEC = None
multplier = toOrdinal
multplierBN = Nakasendo.BigNum(str(toOrdinal), self.modulo)
toOrdinalBN = Nakasendo.BigNum(str(toOrdinal), self.modulo)
encryptedCoeffs = hiddenPolys[fromOrdinal]
resCoeffEC = Player.getECPoint(encryptedCoeffs[0])
for coeff in encryptedCoeffs[1:]:
coeffEC = Player.getECPoint(coeff)
labelTimesPoints = coeffEC.multipleScalar(multplierBN)
resCoeffEC = resCoeffEC + labelTimesPoints
multplierBN = multplierBN * toOrdinalBN
for ofOrdinal, pubPoly in hiddenEvals[fromOrdinal].items():
pubPoly = Player.getECPoint(pubPoly)
if (ofOrdinal == toOrdinal):
if (pubPoly == resCoeffEC):
return True
else:
return False
return False
def test_InitFromListHex():
for x in range(10, 20):
fx = Nakasendo.BigNum().value
modulo = str(randint(1000, 100000))
listCoefficients = []
for i in range(x):
# Generate random coefficients for the polynomial
listCoefficients.append(Nakasendo.BigNum().value)
# create a Polynomial from a list of coefficients
allCoeffeicient = Nakasendo.Polynomial.initFromListHex(
listCoefficients)
assert len(allCoeffeicient.coefficients) == x, "Test failed"
# Calling evaluate polynomial function
allCoeffeicient.modulo = modulo
polynomial_EvaluateFX = allCoeffeicient(fx)
# convert list of coefficients from string to decimal
lst = []
for i in (allCoeffeicient.coefficients):
lst.append(int(i, 16))
fx = int(fx, 16)
modulo = int(modulo, 16)
actualValue = polynomial_evaluate(lst, fx, modulo)
assert polynomial_EvaluateFX.lstrip("0") == hex(
actualValue).upper().lstrip("0X"), "Test failed"
def polynomialPreCalculation(self, poly, mod, ordinal):
self.transientData.reset()
# evaluate polynomial for own ordinal
# polynomial is set to Hex, so convert the ordinal to hex string
self.transientData.f_x = poly(str(ordinal))
bignum = Nakasendo.BigNum(self.transientData.f_x, mod)
self.transientData.hiddenEvals[self.ordinal] = \
str(Nakasendo.ECPoint().GetGeneratorPoint().multipleScalar(bignum))
# evaluate polynomials for the group ordinals
for ord in self.ordinalList:
self.transientData.evals[ord[0]] = poly(str(ord[0]))
bignum = Nakasendo.BigNum(self.transientData.evals[ord[0]], mod)
self.transientData.hiddenEvals[ord[0]] = \
str(Nakasendo.ECPoint().GetGeneratorPoint().multipleScalar(bignum))
# hide own polynomial using generator point
GEN = Nakasendo.ECPoint()
GENPOINT = GEN.GetGeneratorPoint()
for index in poly.coefficients:
bignum = Nakasendo.BigNum(index, mod)
res = GENPOINT.multipleScalar(bignum)
self.transientData.hiddenPolynomial.append(res.value)
def sign(self, groupId, message, signatureData):
group = self.groups[groupId]
self.ptw(
"Player.sign: groupId = {0}, message = {1}, signatureData = {2}\n".
format(groupId, message, signatureData))
# convert dictionary to list of points
points = list(signatureData.items())
interpolator = Nakasendo.LGInterpolator \
( points, Player.modulo, decimal=False)
s_at_zero = interpolator('0')
#DER format
mod_bn = Nakasendo.BigNum(Player.modulo, Player.modulo)
TWO = Nakasendo.BigNum('2', Player.modulo, isDec=False)
modDivByTwo = mod_bn / TWO
canonizedInteropolated_s = s_at_zero
if (s_at_zero > modDivByTwo):
canonizedInteropolated_s = mod_bn - s_at_zero
DerFormatSig = Nakasendo.createDERFormat(group.signer_r,
canonizedInteropolated_s)
mySignature = [group.signer_r, s_at_zero]
self.ptw("DER formatted signature = {0}, signature = {1}"\
.format(DerFormatSig,mySignature ))
return mySignature
def DerivePubKey(Players, modulo=None, isDec=False):
#Multiply the zero element by G and add them up
#secretKeys = []
secret = Nakasendo.BigNum(Players[0].polynomial.coefficients[0], modulo,
isDec)
for i in range(1, len(Players)):
secret = secret + Nakasendo.BigNum(
Players[i].polynomial.coefficients[0], modulo, isDec)
return secret
def HashMsg(msg, modulo=None, IsDec=False):
HASHMSG = Nakasendo.hash256(msg)
if (IsDec):
Hm = Nakasendo.BigNum(str(int(HASHMSG.value, 16)),
modulo.value,
isDec=True)
else:
Hm = Nakasendo.BigNum(HASHMSG.value, modulo.value, isDec=False)
return Hm
def __calc_matrix_sum_col(matrix, modulo=None, dec=False):
vect_sum_col = []
for i in range(len(matrix[0])):
bn = Nakasendo.BigNum('0', modulo, dec)
bn.isDec = dec
vect_sum_col.append(bn)
for row_i in matrix:
for j in range(len(row_i)):
x_ij = Nakasendo.BigNum(row_i[j], modulo, isDec=dec)
vect_sum_col[j] = vect_sum_col[j] + x_ij
return vect_sum_col
def createSecret(self, groupId, calcType, hiddenPolys, hiddenEvals):
self.ptw("creating a secret....")
group = self.groups[groupId]
group.transientData.allHiddenPolynomials = hiddenPolys
result = group.transientData.sumOfEvals
if calcType == 'PRIVATEKEYSHARE':
group.privateKeyShare = result
group.publicKeyShare = group.createPublicKey()
elif calcType == 'LITTLEK':
group.littleK = result
elif calcType == 'ALPHA':
group.alpha = result
else:
msg = "Player:createSecret.calcType is not recognised: {0}".format(
calcType)
self.ptw(msg)
raise PlayerError(msg)
self.verificationOfHonesty(groupId, hiddenEvals, hiddenPolys)
self.verifyCorrectness(groupId, hiddenEvals, hiddenPolys)
# reset evals
group.transientData.evalCounter = 0
group.transientData.sumOfEvals = Nakasendo.BigNum('0', Player.modulo)
return groupId, result
def test_InitFromListModuloHex():
for x in range(10, 20):
modHex = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"
fx = Nakasendo.BigNum().value
degree = randint(10, 15)
# create a random polynomial
listCoefficients = Nakasendo.Polynomial.initRandomHex(degree, modHex)
assert len(listCoefficients.coefficients) == (degree +
1), "Test failed"
# create a Polynomial from a list of coefficient with modulo
coefficientsWithModulo = Nakasendo.Polynomial.initFromListModuloHex(
listCoefficients.coefficients, modHex)
assert len(
coefficientsWithModulo.coefficients) == degree + 1, "Test failed"
# calling evaluate polynomial function
polynomial_EvaluateFX = coefficientsWithModulo(fx)
# convert list of coefficients from string to decimal
lst = []
for i in (coefficientsWithModulo.coefficients):
lst.append(int(i, 16))
fx = int(fx, 16)
modulo = int(modHex, 16)
actualValue = polynomial_evaluate(lst, fx, modulo)
assert polynomial_EvaluateFX.lstrip("0") == hex(
actualValue).upper().lstrip("0X"), "Test failed"
def test_RandomPolynomialMinMaxHex():
for x in range(10):
fx = Nakasendo.BigNum().value
degree = randint(10, 15)
modulo = hex(randint(10000, 1000000)).lstrip("0x")
min = hex(randint(10000, 10000000)).lstrip("0x")
max = hex(randint(10000001, 100000000)).lstrip("0x")
# create a random polynomial with range of min..max
listCoefficients = Nakasendo.Polynomial.initRandomMinMaxHex(
degree, modulo, min, max)
assert len(listCoefficients.coefficients) == (degree +
1), "Test failed"
# calling evaluate polynomial function
polynomial_EvaluateFX = listCoefficients(fx)
# convert list of coefficients from string to decimal
lst = []
for i in (listCoefficients.coefficients):
lst.append(int(i, 16))
fx = int(fx, 16)
modulo = int(modulo, 16)
actualValue = polynomial_evaluate(lst, fx, modulo)
assert polynomial_EvaluateFX.lstrip("0") == hex(
actualValue).upper().lstrip("0X"), "Test failed"
def test_RandomPolynomialFixed_a_0_Hex():
for x in range(10):
fx = Nakasendo.BigNum().value
degree = randint(10, 15)
modulo = hex(randint(10000, 1000000)).lstrip("0x")
a_0 = hex(randint(1000, 2000)).lstrip("0x").upper()
# create a random polynomial with fixed a_0
listCoefficients = Nakasendo.Polynomial.initRandomFixed_a_0_Hex(
degree, modulo, a_0)
assert listCoefficients.coefficients[0].lstrip(
"0") == a_0, "Test failed"
assert len(listCoefficients.coefficients) == (degree +
1), "Test failed"
# calling evaluate polynomial function
polynomial_EvaluateFX = listCoefficients(fx)
# convert list of coefficients from string to decimal
lst = []
for i in (listCoefficients.coefficients):
lst.append(int(i, 16))
fx = int(fx, 16)
modulo = int(modulo, 16)
actualValue = polynomial_evaluate(lst, fx, modulo)
assert polynomial_EvaluateFX.lstrip("0") == hex(
actualValue).upper().lstrip("0X"), "Test failed"
def test_AddFromDec_HexWithBigNumApi():
for i in range(10):
hexValue = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"
num = int(hexValue, 16)
b = str(randint(100000000, num))
c = str(randint(100000000, num))
x = Nakasendo.BigNum()
y = Nakasendo.BigNum()
b = Nakasendo.BigNum(b, isDec=True)
c = Nakasendo.BigNum(c, isDec=True)
z = y.__add__(x)
a = b.__add__(c)
assert z == (x + y) and a == (b + c), "Test failed"
def test_LGInterpolatorFullHex():
listTupleObj = [(2, "A"), (3, "F")]
modulo = "0"
hex_value = 0
for x in range(100, 200):
randomX = Nakasendo.BigNum()
xValue = str(randomX.value)
# LGInterpolator, full evaluation of the polynomial at xValue
lgInterpolatorX = Nakasendo.LGInterpolator(listTupleObj, modulo,
hex_value)
lgInterpolatorX = lgInterpolatorX(xValue)
TestVal = Nakasendo.BigNum(value=hex(int(randomX.value, 16) *
5).lstrip("0x").upper(),
mod=modulo,
isDec=hex_value)
assert lgInterpolatorX == TestVal, "Test failed"
def reset(self):
self.f_x = None # f(x): Polynomial evaluated for own ordinal
self.evals = {} # dict ordinal:evaluated for each o in ordinallist
self.sumOfEvals = \
Nakasendo.BigNum('0', self.modulo) # running total of evals
self.evalCounter = 0 # counter of eval messages received from other Players
self.hiddenEvals = {
} # Polynomial evaluations multiplied by generator point
self.hiddenPolynomial = [] # coeffs multiplied by generator point
self.allHiddenPolynomials = {}
self.allVWshares = {} # dict of V W shares from all players
def allEvalsReceived(self, groupId, toOrdinal, fromOrdinal, f_x):
group = self.groups[groupId]
#check toOrdinal matches own ordinal
if toOrdinal != group.ordinal:
msg = "allEvalsReceived toOrdinal is not correct. Received {0}, expected {1}".format \
(group.ordinal, toOrdinal)
self.ptw(msg)
raise PlayerError(msg)
# add onto running total
group.transientData.sumOfEvals += Nakasendo.BigNum(f_x, Player.modulo)
# increment counter
group.transientData.evalCounter += 1
if group.transientData.evalCounter != len(group.ordinalList):
return False
else:
# last one, add on the evaluation for own ordinal
group.transientData.sumOfEvals += Nakasendo.BigNum(str \
( group.transientData.f_x), Player.modulo )
return True
def test_LGInterpolatorFullDec():
listTupleObj = [(2, "10"), (3, "15")]
modulo = "0"
dec = 1
for x in range(100, 101):
randomX = randint(1000, 1000000)
xValue = str(randomX)
# LGInterpolator, full evaluation of the polynomial at xValue
lgInterpolatorX = Nakasendo.LGInterpolator(listTupleObj, modulo, dec)
lgInterpolatorX = lgInterpolatorX(xValue)
TestVal = Nakasendo.BigNum(value=str(randomX * 5),
mod=modulo,
isDec=dec)
assert lgInterpolatorX == TestVal, "Test failed"
def calculateEphemeralKey(self, groupId):
group = self.groups[groupId]
self.ptw("Calculating Ephemeral Key...")
xfx_v = []
xfx_w = []
allOrdinals = group.allOrdinals()
#allOrdinals = []
#for i in group.ordinalList :
# allOrdinals.append( i[0] )
#allOrdinals.append(group.ordinal)
for ord in allOrdinals:
vw = group.transientData.allVWshares[ord]
xfx_v.append((ord, vw[0]))
point = Nakasendo.ECPoint()
point.SetValue(vw[1])
w_points = point.GetAffineCoOrdinates()
xfx_w.append((str(ord), w_points[0], w_points[1]))
v_interpolator = Nakasendo.LGInterpolator \
( xfx_v, Player.modulo, decimal=False)
w_interpolator = Nakasendo.LGECInterpolator \
( xfx_w, Player.modulo, decimal=False)
vZeroVal = v_interpolator('0')
wZeroVal = w_interpolator('0')
vZeroValInv = vZeroVal.inverse()
interpolated_r = wZeroVal.multipleScalar(vZeroValInv)
if (interpolated_r.IsPointOnCurve() is not True):
msg = ("Error in Player:calculateEphemeralKey: point not on curve")
self.ptw(msg)
raise PlayerError(msg)
interpolated_r_points = interpolated_r.GetAffineCoOrdinates()
r_bn = Nakasendo.BigNum(interpolated_r_points[0], Player.modulo)
ephemeralKey = [group.littleK, r_bn]
group.ephemeralKeyList.append(ephemeralKey)
def test_MultiplyByGenerator():
# Generating Random EC
for x in range(10):
# using the integer value of NID secp256k1, which is 714
nID = 714
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint(nID)
bigNumB = Nakasendo.BigNum()
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
x_axis, y_axis = hexValue.GetAffineCoOrdinates()
assert len(x_axis) == 62 or len(x_axis) == 64, "Test failed"
# EC Point Scalar multiply on curve with supplied ID
actualValue = str(
Nakasendo.MultiplyByGenerator(bigNumB, compressed=True))
assert len(actualValue) == 66, "Test failed"
def requestSignatureData(self, groupId, message):
group = self.groups[groupId]
ephemeralKey = group.ephemeralKeyList.pop()
littleK = ephemeralKey[0]
r_bn = ephemeralKey[1]
pks = group.privateKeyShare
if group.signingInitiator == True:
group.signer_r = r_bn
# message needs to be in BigNum format
Hm = Nakasendo.BigNum(message, Player.modulo)
s = littleK * (Hm + (pks * r_bn))
#self.ptw("s = {0}".format(s))
return [groupId, group.ordinal, s.value, message]
def requestSignatureData(self, groupId, index, message):
group = self.groups[groupId]
# check the index
if not self.validIndex(groupId, index):
return [groupId, group.ordinal, '', message]
ephemeralKey = group.ephemeralKeyList.pop(index)
littleK = ephemeralKey[0]
r_bn = ephemeralKey[1]
pks = group.privateKeyShare
if group.signingInitiator == True:
group.signer_r = r_bn
# message needs to be in BigNum format
Hm = Nakasendo.BigNum(message, Player.modulo)
s = littleK * (Hm + (pks * r_bn))
return [groupId, group.ordinal, s.value, message]
def test_LGECInterpolatorFull():
# modulo = PyBigNumbers.GenerateRandPrimeHex(1000)
modulo = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"
xValue = Nakasendo.BigNum().value
listTupleObj = []
hex_value = False
# Generating Random EC
for x in range(10, 50):
# Generate a Random EC Point with default NID ==> NID_secp256k1
hexValue = Nakasendo.ECPoint()
print(hexValue.value)
# Check if the point is on the curve with the supplied NID default NID ==> NID_secp256k1
assert hexValue.IsPointOnCurve(), "Test failed"
x_Axis, y_axis = hexValue.GetAffineCoOrdinates()
# EC Point GetAffineCoOrdinates_GFp with default NID => NID_secp256k1
listTupleObj.append((str(x), x_Axis, y_axis))
lgInterpolatorX = Nakasendo.LGECInterpolator(listTupleObj, modulo,
hex_value)
lgInterpolatorX = lgInterpolatorX(xValue)
assert type(lgInterpolatorX) == Nakasendo.ECPoint, "Test failed"
except getopt.GetopError:
print ('TSSteps.py -t <threshold> -m <MESSAGE>')
sys.exit(2)
# define the group size
for opt,arg in opts:
if opt in ("-t","--threshold"):
tt = arg
elif opt in ("-m","--message"):
msg = arg
'''
#n is the order
modulo_n = Nakasendo.BigNum()
modulo_n.value = 'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141'
#modulo_n.value = '115792089237316195423570985008687907852837564279074904382605163141518161494337'
#p is the finite fielf
modulo_p = Nakasendo.BigNum()
modulo_p.value = 'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F'
Hm = HashMsg(msg, modulo_n)
margin = random.randint(0, 15)
#tt = 2
#nn = 2 * tt + 1 + margin
nn = 2 * tt + 1
print('the degree t %s, the Signing Threshold is %s and group size %s' %
(tt, (2 * tt + 1), nn))
#calculate Key shares & the private key
import PyMessageHash
import PyAsymKey
import PyPolynomial
import PyBSVAddress
import Nakasendo
except ImportError as e:
print('Error while loading SDKLibraries python modules {}'.format(
e.message))
print(
'Try to define environment variable SDKLIBRARIES_ROOT pointing to the location of installed SDKLibraries or add this to PYTHONPATH'
)
raise ImportError('Unable to load SDKLibraries python modules')
if __name__ == "__main__":
print("starting.....")
bigNumA = Nakasendo.BigNum()
bigNumB = Nakasendo.BigNum()
c = bigNumA + bigNumB
print("operator A -> %s, ..... operator B-> %s" % (bigNumA, bigNumB))
print("...result of addition %s", c)
ECPointA = Nakasendo.ECPoint()
print("ECPointA output %s" % ECPointA)
ECPointB = Nakasendo.ECPoint()
print("ECPointB output %s " % ECPointB)
ECPointC = ECPointA + ECPointB
print("ECPointC (ECPointA + ECPointB) output %s " % ECPointC)
def __calc_shared_secret(polynomials, modulo=None, isDec=False):
sharedSecret = Nakasendo.BigNum('0', modulo, isDec)
for polynomial_i in polynomials:
hiddenVal = Nakasendo.BigNum(polynomial_i.coefficients[0], modulo)
sharedSecret = sharedSecret + hiddenVal
return sharedSecret
ECPointA = Nakasendo.ECPoint ()
print ("ECPointA output %s" % ECPointA )
ECPointB = Nakasendo.ECPoint ()
print ("ECPointB output %s " % ECPointB)
coordsA = ECPointA.GetAffineCoOrdinates()
print ("Random Elliptic Curve Point A:\n x = %s \ny= %s" % (coordsA[0], coordsA[1]))
coordsB = ECPointB.GetAffineCoOrdinates()
print ("Random Elliptic Curve Point B:\n x = %s \ny= %s" % (coordsB[0], coordsB[1]))
bigNumA = Nakasendo.BigNum()
bigNumB = Nakasendo.BigNum(ECPointA.value)
print (bigNumB)
GENPOINTA = ECPointA.GetGeneratorPoint()
GENPOINTB = ECPointB.GetGeneratorPoint()
print (GENPOINTA)
print (GENPOINTB)
# print ("Random Elliptic Curve Point GEN \n x = %s \ny= %s" % (coordsGen[0], coordsGen[1]))
G = ecdsa.SECP256k1.generator
print (G)
if (pubkeytestB.verifies(int(hmMessage.value, 16), thresHoldSigLocalCal)):
print(
"SUCESS WITH TS via ECDSA library .. point constructed from public key parameter"
)
else:
print("FAILURE WITH TS via ECDSA library")
if (dersigStr is not None):
orderlen = (1 + len("%x" % N)) // 2
print(orderlen)
print(len(dersigStr))
print(len(bytes(dersigStr, 'utf-8')))
rBN = Nakasendo.BigNum(
value=sigRStr,
mod=
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141")
sBN = Nakasendo.BigNum(
value=sigSStr,
mod=
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141")
derSigInputBN = Nakasendo.BigNum(
value=dersigStr,
mod=
"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141")
DerFormatSigTest = Nakasendo.createDERFormat(rBN, sBN)
assert (DerFormatSigTest == DerFormatSigTest)
val = Nakasendo.verifyDER(message, pempubkey, dersigStr, False)
if (val == True):
print('TS DER format verified')
